At least 11 fans were arrested before and after last night’s game between Vale and Stoke City under-21s.

Seats, toilets and windows were broken in the away section while flares and other missiles were thrown on to the pitch.

Porter said: "I couldn't believe what I was watching. It was unbelievable to see grown men and youths doing what they were doing. It was just an embarrassment, crazy.

"They were chucking bottles, missiles, lighters, coins, smoke bombs, flares, ripping seats out and throwing them. It was absolutely ridiculous behaviour, absolutely unnecessary. This is a city that should be united not divided. Banter is fair and good and having a laugh and a joke is great, but that level of - let's not say it is anything other than mindless, moronic behaviour - is not welcome in any football club.

"I hope they all get a knock on the door and they all get banned. They are tarnishing a club."

Porter says the problems came from a section of the 3,800 Stoke City supporters, but says their actions shouldn't reflect on the vast majority of City fans.

He said: "Every club has its minority and 95 per cent of Stoke fans that came did so to watch football. As for the five per cent that caused trouble, I am sorry, there is no place for you in football.

Smoke bombs are thrown into the Port Vale fans from the away end

"Some of those people were probably two or three when we last played a derby. It has done no favours for their under-21s because they wouldn't want to be playing in that kind of that hostile atmosphere.

"When the Vale players are celebrating a goal and having flares and bottles and coins thrown at them, that is a disgrace.

"I have had many messages from Stoke fans who are embarraased. If a Vale fan has thrown something then that is wrong as well. I am not going to condone anything like that. What I will say is that if there were any Vale fans misbehaving it was very much a minority."

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He said: "Whether you are a steward or a police officer, you shouldn't have to go to work and face that level of hostility.

"I don't think the police did anything wrong, they did a good job because that could have got really nasty, we could have ended up with pitch invasions.

"They did well and had a measured response, they did what they needed to do. Now we have to leave the police to do their work, identify these people through the CCTV images and knock on the door, take them through the judicial system and get rid of them, out of football, because that is the dark ages of football. It is something we don't need to witness."

"I have had phone calls from Stoke fans who are absolutely embarrassed (about the trouble). Every Stoke fan I have spoken to is appalled by the behaviour, so please identify those that have done it and let's get them some banning orders and get them out of the national game.

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"To all the Stoke fans that came and did behave, thankyou. The ones that didn't have really let you down."

The damage to the Hamil End Stand housing the Stoke supporters is likely to run into thousands of pounds.

Porter added: "I really don't know who should be paying for the damage, that is for the two clubs to sort out. But the one thing I think is important to mention is that I am now confident that not giving them the Railway Paddock was the right thing to do. I think the Vale, the police and the stewards worked hard in a very difficult situation."